Car truck



S. P. BUSH Oct. 29, 1929.

CAR TRUCK,

Filed July 1926 2 Sheets-Sheet. 1

' gwuentoz Quorum Oct. 29, 1929.

s. BUSH CAR TRUCK Filed July 0, 1926 2 Sheets-Sheet 2 Patented Oct. 29,1929 UNITED STATES PATENT OFFICE SAMUEL I. BUSH, O1 COLUMBUS, OHIO,ASSIGNOR TO THE BUCKEYE STEEL OASTINGS COMPANY, OF COLUMBUS, OHIO CABTRUCK Application filed July 20,

This invention relates to car trucks and has special reference to thespring arrangement for supporting the bolster, the object being toefi'ect equal distribution of the load upon the s rings. The inventionis illustrated in t e accom anying drawings and will be hereinafter fuly set forth and defined.

In the accompanying drawings, Figure 1 is a view partly in sideelevationand partly in section;

Figure 2 is a view partly in plan and partly in horizontal section of aportion of a ear truck embodying the present invention;

Figure 3 is a view showing the side frame in transverse section and thebolster and spring plank in elevation;

Fi re 4 is a view similar to Fig. 2 but showing a different arrangementof springs.

The side frame 1 is a single integral casting having an uppercompression member, a lower tension member, and columns 2 connectingsaid members and defining an opening in which the ends of the bolster 3and spring plank 4 are received. The columns have inwardly rojectinextensions 5 on their lower portions, an the spring lank rests upon andconforms to the side rame between said extensions. In the upper side ofthe spring plank, near the end t ereof, 1s a socket or recess 6 and overthe end of the spring lank is arranged a spring bearer or carrier ofcruciform outline and provided at its center on its bottom with abearing lug or maker 8 engaging in the central portion of the socket 6whereb the spring bearer will be carried directly y the spring plank andmay rock or oscillate relative thereto, the actual portions in contactbetween the bearer and sprin plank, being in effect, point bearings anda apted to provide relative rocking or oscillating movement between the'two parts, rather than sliding movement as would occur where partlyspherical surfaces are engageable throughout their extent of surfaces.Other forms of bearings between the spring bearer and the spring plankmay be used and I do not limit myself to the socket form shown. Thespring bearer is provided with upstanding ribs to give it strength andwhereby also so the springs will be restrained 1928. Serial No. 123,722.

against dis lacement, and the arms of the bearer are isposed to extendlongitudinally of the spring plank and the side frame respectively, thearms which'extend along the side frame being received between theextensions of the respective columns. Upon each lobe, or each end of thearms of thespring through concave arcs. The rib 11 in the form shown inFig. 4 extends across the several ends or lobes of the spring bearer asshown at 12 to define a central rectangular box or seat for a centralspring 13, there being a similar spring set on each projectin end of thebearer and the rib being extende along the-ed es to retain the springsin place. Except in t e particulars just noted, the form shown in Fig. 4is the same as the form shown in Figs. 1, 2 and 3.

In both forms of the invention, the load upon the springs is evenlydistributed and the spring group is effectually held against separationwhile it is permitted to rock sufliciently to compensate for thevibration incident to travel or shifting of the car load.

Having fully described my invention what I claim as new and desire tosecure by Letters- Patent, is

1. In a car truck comprisin a side frame having upper and lower mem ers,and columns, vall cast inte al, a bolster and sprin openin between saidcolumns, a spring pla ada te to rest u on and to fit the contour of t elower member between the columns, a springlbearer supported by thespring plank over t e lower member and adapted to carry springssubstantially at their lower portion.

2. In a car truck comprisin a side frame having upper and lower mem rs,and colhoused by the columns umns, all cast integral, a bolster andspring openin between said columns, a spring plank adapted to rest uponand to fit the contour of the lower member between the columns, andadapted to carry springs substantially housed by the columns at theirlower portions.

3. In a car truck the combination of a side frame, a spring bearermounted in the frame for rocking movement and partially housed by thecolumns, and bolster-supporting springs set on the bearer.

4. In a truck, the combination of a. side frame, a spring plank mountedin the side frame, a spring bearer carrying bolster supporting springsand superimposed directly on the spring plank, and means wherebyrelative universal" oscillating movement may take place between thespring plank and the spring bearer.

5. In a car truck, the combination of a side frame, a spring plankmounted in the side frame and having a spherical socket in its upperside between the sides of the side frame,

and a spring bearer to carry bolster-supporting springs, said bearerbeing provided on its under side with a central spherically convexbearing lug seating in the socket in the 7 spring plank.

In testimony whereof, I have signed this specification.

SAMUEL P. BUSH.

